numpy resize

import numpy as np

a = ([[1,2,3],[4,5,6]])

print(a)

print()

[[1 2 3]
 [4 5 6]]

(2, 3)

b= (a,(3,3))

[[1 2 3]
 [4 5 6]
 [1 2 3]]

自动向右扩展(自动向右增加)

自动向下扩展(复制第一行)